Why does it say 'republic' not 'state'?

The term "republic" emphasizes a system of government in which power resides with the people and their elected representatives, rather than being concentrated in a singular authority or monarch, which is often implied by the term "state." A republic typically upholds principles such as rule of law, individual rights, and democratic governance, distinguishing it from autocratic or oligarchic systems. Thus, using "republic" highlights the political structure and values that prioritize citizen participation and rights.